MANCHESTER, Tenn. — As most of the nearly 70,000 Bonnaroo attendees head out of Manchester for home today, cleanup crews will begin in earnest picking trash and discarded camping equipment.

Organizers, however, are already planning for 2009.

One significant change on the lineup is the addition of electricity to the site, according to Ashley Capps, president of AC Entertainment, co-producers of the music and arts festival.

“As soon as we wrap, we will begin work on putting in electricity. Mr. Capps said he could not release cost estimates for the project, but said it will be significant.

“It is the one area that we feel we can recoup that investment,” he said. “We power everything by fuel right now and everybody knows about fuel costs.”

For the previous seven festivals, generators, burning biodiesel, have provided power. The fuel choice was a conscious choice for the environmentally friendly festival, according to organizers.

“We are very Earth friendly and always have been,” said Rick Farman, co-president of Supefly Productions, event co-producers.

Wherever possible, products sold or used at the festival are recyclable or biodegradable, Mr. Capps said.

In 2007, Bonnaroo produced 250 tons of trash, most of which was recycled or composted, and 30,000 gallons of biodiesel were consumed.

This year, horses replaced fuel-powered security vehicles and the manure will be donated to Coffee County farmers.

For a festival that drew people from 50 states and 27 countries either by car, RV or airplane, it’s unclear how significant the greening efforts are versus the actual impact on the environment, but Mr. Capps said that everything helps.

The festival also, provides a good deal of education, he said.

“Maybe people will leave here more aware,” he said.

For Nashville resident and former Chattanoogan Diane Crabtree, 50, her first visit to Bonnaroo was a great time. She attended with her three sons, 23, 21 and 14.

“I was prepared for the worst,” she said. “I was really having second thoughts about bringing a 14-year-old, but it has been absolutely wonderful, and we’ve been staying out until 3 a.m. It has really been a lot of fun and very well organized.”